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慢性缺氧对于细胞外囊泡表型的适应
Chris S Pridgeon1, Kerttu Airavaara1, Julia Monola1
1Division of Pharmaceutical Biosciences, Drug Research Program, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland.
Scientific reports
|October 25, 2024
概括
慢性缺氧 (超过2周) 是细胞及其细胞外囊泡 (EVs) 完全适应的必要条件,影响细胞表型. 在EV和细胞研究中,较短的缺氧期可能会产生偏差的结果.
科学领域:
- 细胞生物学 细胞生物学
- 细胞外囊泡 (EVs) 的研究.
- 低氧性研究的研究.
背景情况:
- 氧气水平显著影响细胞和细胞外囊泡 (EV) 现型.
- 低毒细胞培养可以模拟体内条件,包括瘤.
- 之前的研究经常使用短暂的低氧持续时间 (≤72小时),可能会限制适应.
研究的目的:
- 研究急性 (72小时) 和慢性 (>2周) 缺氧对HepG2和PC3细胞和EV表型的影响.
- 为了确定短期缺氧是否足以进行细胞和EV适应.
- 了解细胞系特异性对长期低氧条件的反应.
主要方法:
- 在急性和慢性缺氧条件下培养HepG2和PC3细胞.
- 检查细胞和EV表型,包括蛋白质表达和EV产生.
- 在慢性缺氧下培养的细胞的冷保存和恢复.
主要成果:
- 细胞适应慢性缺氧是可能的,细胞成功地冷保存和恢复.
- 低氧对EV表型的影响发展缓慢,并依赖于细胞系.
- 只有在慢性缺氧的情况下,PC3细胞显示出显著的表型变化和增加的EV产量.
- 在急性和慢性缺氧的情况下,HepG2细胞表现出双相EV表型变化,急性暴露后蛋白质表达变化达到峰值.
- 在 HepG2 细胞中,EV 生产不受缺氧的影响.
结论:
- 长期低氧培养 (>2周) 对于细胞完全适应而不是诱导氧气耗尽至关重要.
- 细胞和EV对缺氧的反应是复杂的,并表现出两相变化.
- 研究结果强调了培养时间在涉及细胞和EVs的低氧研究中的重要性.
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